fesetenv()

Set the current floating-point environment

Synopsis:

#include <fenv.h>

int fesetenv( const fenv_t *envp );

Arguments:

envp
A pointer to a fenv_t object where the function can copy the environment from. You must have obtained this value from a previous call to feholdexcept() or fegetenv(), or be FE_DFL_ENV, which points to a full copy of the default floating-point environment (i.e., the environment as loaded at program startup).

Library:

libm

Use the -l m option to qcc to link against this library.

Description:

The fesetenv() function sets the current floating-point environment from the object that envp points to. If any of the floating-point status flags are set in envp, they're set in the environment (and you can then use fetestexcept() to test for them), but the corresponding floating-point exceptions aren't raised.

Returns:

O on success, or a nonzero value if an error occurred.

Classification:

C99, POSIX 1003.1

Safety:  
Cancellation point No
Interrupt handler No
Signal handler No
Thread Yes